If you don't believe tire pressure is a impact, and that lower is sometimes better than higher I think it would be fun to put you in a sprint car with 25 lbs pressure in the left rear... lol We run down in the low teens on hard tracks. Clay is a magical surface, it changes traction every couple minutes, and often when least expected, we carry 2 to 5 different compound tires for each corner of the car.
I've watched some really sharp college folk do all the math set their tire pressure and chase their tales and drag cars off the wall all day long while the old dude at the other end of the pits with his old chev truck and a flat trailer and no computer took their lunch money because he knows how to read the tires and the track...
Of course this is the extreme end of the curve, its about the tire performing inside the boundaries of the need at the moment.
My wifes 318ti gets nasty treacherous as soon as you get the back tires over 35 lbs.
It stops WAY faster with the tires at 26 front 28 rear than it does at 32 front 35 rear.
It gets way higher G numbers on the skid-pad as well.
It will smoke the rear tires with 35 lbs in the rear, it cant break them loose at 25 rear.
Tire & Traction = Pure Voodoo...
Dave